diff --git a/configs/neovim.nix b/configs/neovim.nix
index 12a010b..9e72bb4 100644
--- a/configs/neovim.nix
+++ b/configs/neovim.nix
@@ -46,6 +46,7 @@
     pkgs.haskellPackages.haskell-language-server
     pkgs.texlab
     pkgs.nil
+    pkgs.nixfmt-rfc-style
     pkgs.rust-analyzer
     pkgs.nodePackages.typescript-language-server
     pkgs.lua-language-server
diff --git a/lib/vim/init.lua b/lib/vim/init.lua
index 695dbb8..fd5489f 100644
--- a/lib/vim/init.lua
+++ b/lib/vim/init.lua
@@ -113,7 +113,13 @@ local language_servers = {
   html = {}, -- vscode-langservers-extracted
   jsonls = {}, -- vscode-langservers-extracted
   lemminx = {}, -- lemminx (for xml)
-  nil_ls = {}, -- github:oxalica/nil
+  nil_ls = {
+    ['nil'] = {
+      formatting = {
+        command = { "nixfmt" },
+      },
+    },
+  }, -- github:oxalica/nil
   dhall_lsp_server = {}, -- dhall-lsp-server
   -- rnix = {}, -- rnix-lsp
   jqls = {}, -- jq-lsp